Hi For exclude all doubts with more verification i have build last (llvm,clang,rt) with this new gcc-6.3.0 , the compiler seems work perfectly. root@raspberrypi_1:/usr/bin# clang --version clang version 3.9.1 (tags/RELEASE_391/final) Target: armv6l-unknown-linux-gnueabi Thread model: posix Installed...